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Fluffy air fryer mug omelet with melted cheddar cheese and scallions in a white ramekin

Air Fryer Mug Omelet

5 from 2 votes
Prep Time: 5 minutes
Cook Time: 5 minutes
Total Time: 10 minutes
Servings: 1 Serving

Description

:This fluffy Air Fryer Mug Omelet is the easiest single-serve breakfast you'll ever make — just 2 eggs, a ramekin, and 10 minutes. Naturally low-carb, keto-friendly, and endlessly customizable with your favorite cheese, veggies, or meat add-ins.

Ingredients 

  • 2 large eggs, room temperature
  • 1 tablespoon unsalted butter, melted
  • 1 tablespoon whole milk, or heavy cream for keto
  • 1 tablespoon scallions, green onions, thinly sliced
  • ¼ cup shredded cheddar cheese, freshly shredded
  • ½ teaspoon dried thyme
  • ½ teaspoon kosher salt
  • ¼ teaspoon freshly ground black pepper
  • Cooking spray or extra butter, for greasing the ramekin

Instructions

  • Whisk the eggs. In a small bowl, crack the eggs and add the melted butter, milk, scallions, thyme, salt, and pepper. Whisk vigorously for about 30 seconds until pale yellow and slightly frothy.
  • Prep the ramekin. Lightly grease a 10–12 oz oven-safe ramekin or mug with cooking spray or a smear of butter.
  • Pour and top. Pour the egg mixture into the ramekin — it should fill it about halfway. Sprinkle shredded cheddar evenly over the top.
  • Air fry. Place the ramekin directly into the air fryer basket. Cook at 330°F (165°C) for 5 minutes. No preheating needed.
  • Check for doneness. The top should be puffed and golden; a knife inserted in the center should come out clean. If still wet, add 1–2 more minutes.
  • Rest and serve. Let the omelet rest for 1 minute (it will deflate slightly — that's normal). Eat directly from the ramekin or run a knife around the edge and invert onto a plate. Top with extra scallions if desired.

Equipment

  • Air fryer (basket-style or oven-style)
  • 10–12 oz oven-safe ramekin or mug,
  • Small mixing bowl
  • Whisk or fork

Notes

  • Air fryer model matters. Basket-style air fryers (Cosori, Ninja AF) run hotter than oven-style models. Check at 4 minutes the first time you make this.
  • For a larger omelet: Use 3 eggs, scale other ingredients by 1.5x, and cook for 6–7 minutes.
  • Make it dairy-free: Swap butter for olive oil, milk for unsweetened almond milk, and use dairy-free shredded cheese.
  • Adding veggies? Pre-cook watery vegetables (mushrooms, spinach, peppers, tomatoes) before adding to the eggs — otherwise the omelet turns soggy.
  • Best cheese swaps: Mexican blend, Monterey Jack, pepper jack, gruyère, or feta all work beautifully.
  • Storage: Refrigerate covered for up to 3 days. Reheat in the air fryer at 300°F for 2–3 minutes.

Nutrition

Serving: 1ServingCalories: 372kcalCarbohydrates: 3gProtein: 20gFat: 31gSaturated Fat: 16gPolyunsaturated Fat: 3gMonounsaturated Fat: 9gTrans Fat: 1gCholesterol: 432mgSodium: 1498mgPotassium: 213mgFiber: 0.5gSugar: 1gVitamin A: 1279IUVitamin C: 1mgCalcium: 294mgIron: 3mg